Question:

> I have a 2001 explorer Sport and I am hearing a humming noise….Sounds like > its coming from the engine…I had the transmission flushed thinking maybe > that would solve the humming…but its still there…any suggestions?

I had that happen on my 96.  Turned out there is a small motor on the air intake that operates a damper for quicker warm ups.  It had failed causing the humming to increase as the engine warmed up. Gets really loud.

Response:

Vacuum leaks can often offer up a reedy sounding buzz or hum. You can try disconnecting the IAC and see if that might be the problem….. there is no "warm up valve" on the intake. Jim Warman

– Hide quoted text — Show quoted text -> I have a 2001 explorer Sport and I am hearing a humming noise….Sounds like > its coming from the engine…I had the transmission flushed thinking maybe > that would solve the humming…but its still there…any suggestions?

Response:

> I have a 2001 explorer Sport and I am hearing a humming noise….Sounds like > its coming from the engine…I had the transmission flushed thinking maybe > that would solve the humming…but its still there…any suggestions? > I had that happen on my 96.  Turned out there is a small motor on the > air intake that operates a damper for quicker warm ups.  It had failed > causing the humming to increase as the engine warmed up. Gets really > loud.

I had the same problem on my ‘98.  Some times it would cause a sputter if I got on the gas too quick from a stop.  I would call it more of a whistling however.

Response:

I have a 2001 explorer Sport and I am hearing a humming noise….Sounds like its coming from the engine…I had the transmission flushed thinking maybe that would solve the humming…but its still there…any suggestions?

Response: